Red 'uns really do go fasta

The majority of Meks never truly understand what they are creating, or the exact functions of how they work. As Orks are poor rationalists, this can lead to rather unlikely conventions.

For example, it is widely believed by Orks that machines painted in a red colour operate faster. This could have come about by the following situation. A Mek builds two vehicles which, as far as it is aware of, are exactly the same except for the fact that one is painted red and the other yellow. However, due to some unseen variation in fuel, lubrication, or some other factor, the red vehicle in fact, travels faster. To the Ork, the only conceivable explanation is that the vehicle travels faster because it is red.

However, as disturbing as it sounds, these 'facts' become true. Red Ork vehicles do travel perceptively faster than those of other colours, even when all other design aspects are nominally the same. Similarly, many captured Ork weapons and items of equipment should not work, and indeed do not work unless wielded by an Ork. I believe this is linked to the strong psychic aura surrounding all Orkoids and have developed the Anzion Theorem of Orkoid Mechamorphic Resonant Kinetics. I theorise that many Ork inventions work because the Orks themselves think that they should work. The strong telekinetic abilities of the Orks' subconscious somehow ensure that the machinery or weaponry functions as desired.

- Codex: Orks, page 48